803421030 XCMG GR2605 motor grader hose assembly

803421030 XCMG GR2605 motor grader hose assembly

The 803421030 hose assembly is a core component of the XCMG GR2605 grader’s original hydraulic piping system. It is compatible with the machine’s high-pressure hydraulic system, undertaking the crucial tasks of stable hydraulic oil delivery and pressure transmission. It directly impacts the accuracy and response speed of key actuators such as the ripper’s motion control circuit, the right articulated steering main oil circuit, and the hydraulic valve group’s output branch lines. In harsh operating environments characterized by long-term heavy loads, high-frequency vibration, and dust and mud erosion, such as highway construction, mine stripping, airport runway construction, and large-scale earthwork projects, it can reliably withstand high-pressure impacts and is less prone to bursting, oil leakage, aging cracking, and other malfunctions. This effectively reduces the frequency of hydraulic system downtime for maintenance, ensuring continuous equipment operation efficiency. =

The hose features a three-layer reinforced composite structure with an optimized design. The inner tube is made of high-quality oil-resistant nitrile rubber (NBR), with an oil swelling rate of ≤2.2% and excellent chemical corrosion resistance. It is compatible with XCMG original L-HM 46/68 anti-wear hydraulic oil and high-temperature hydraulic oil. The middle layer is a high-tensile-strength galvanized steel wire braided reinforcement layer, using a dense braiding process, with a breaking strength ≥2020MPa, stable pressure resistance, and excellent deformation resistance. The outer rubber layer is made of wear-resistant and weather-resistant special synthetic rubber material with a Shore hardness of 70HA, excellent flexibility, UV aging resistance, and outstanding resistance to sand and gravel abrasion. It showed no cracking or fading after 6100 hours of outdoor aging testing. The connector is precision forged from 40# steel and treated with phosphate and galvanizing for double anti-corrosion. It is equipped with an original custom fluororubber (FKM) sealing ring, achieving an IP66 protection rating, perfectly matching the original vehicle interface specifications, and can directly replace aged or damaged original vehicle hoses.

List of Compatible Hydraulic Components

Rider Action Control Circuit (Compatible with GR2605 Dedicated Rider Cylinder)
Right Articulated Steering Main Hydraulic Circuit (Compatible with Cylinder Model 803077608)
Hydraulic Valve Assembly Output Branch Pipeline (Compatible with GR2605 High-Pressure Valve Assembly)
Side Push Cylinder Control Hydraulic Circuit (Compatible with GR2605 Dedicated Model)
Hydraulic Pump Outlet Main Branch Pipeline (Matching Original High-Pressure Hydraulic Pump)
High-Pressure Accumulator Auxiliary Connection Pipeline (Supports System Pressure Stability)
Brake Main Hydraulic Circuit Branch (Compatible with Wet Brake Drive Axle)

Core Parameters

Part Model: 803421030
Product Name: Hose Assembly
Applicable Models: XCMG GR2605 Motor Grader
Application: High-pressure oil transmission and pressure transfer in hydraulic systems
Structure: Three-layer reinforced composite structure (high-quality NBR inner tube + Dense steel wire braid + special synthetic rubber outer layer) Rated working pressure: 42MPa Instantaneous impact pressure: 62MPa Working temperature range: -45℃ to 127℃ Hose inner diameter: 18mm Standard length: 1080mm (customizable to original factory requirements) Features: Suitable for medium and high pressure applications, impact and fatigue resistant, long-lasting leak-proof seal, wear and weather resistant, precise original factory fit, excellent flexibility Applicable working conditions: Heavy-duty flat surface operations such as highways, mines, airports, and earthmoving.

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